I watched podcasts, mostly in my last year of high school. I had subscribed to a few and would check regularly during math for new uploads. Since graduation was near I couldn't get motivated most days to focus on the work. The work was also on the school computers so I kept a tab open with the podcast and a tab with the classwork. The teacher didn't mind, he would sometimes ask which ones I was listening to.
I still didn't want to fail, so I had usually one or two days in the week where I focused intently on catching up.
I listened to podcasts nearly every day during that school year, but I don't think I've went back and checked any since I graduated.